Chris and Morgane Stapleton Welcome Twins!

On Chris Stapleton's 40th birthday (April 15), and during the 2018 ACM Awards, the country star and his wife and musical partner Morgane announced the birth of their twins, both boys. Talk about a big day!

Stapleton and his wife skipped the 2018 ACM Awards ceremony in Las Vegas, Nev., on April 15 because she was due to give birth soon. When Stapleton was announced as the winner of Album of the Year at the awards show, host Reba McEntire hopped up onstage to explain that the country star wasn't at the awards show because of Morgane's impending due date ... and that, in fact, "those little rascals came a little bit early!"

Try more than a month early. On Tuesday (April 17), Morgane shared the first photo of the twin boys on Instagram, explaining that their early arrived meant a week-long stay in the NICU at Nashville's Centennial Women's and Children's Hospital.

"We’re so grateful to finally be home with our sweet family," she writes. "We would like to say a special thank you to all the incredible nurses & doctors at Centennial Women’s & Children’s Hospital in Nashville ... [T]he incredible people there kept our boys healthy & happy. Words cannot express our gratitude for you all & what you did for our family. From the bottom of our hearts, thank you!

The Stapletons' two new twin boys -- whose names and other birth details have not been revealed -- have two older siblings at home, one boy and one girl. The Stapletons announced the exciting news that Morgane was pregnant with twins on Oct. 30, 2017 -- their 10th wedding anniversary -- with an Instagram post. Stapleton mentioned the twins again a week later, on Nov. 8, thanking his "kids -- and the kids that are on the way" when he accepted the 2017 Album of the Year award at the CMAs.

"Thank you for sharing our good news Reba!" Stapleton tweeted on Tuesday (April 17). "We couldn't have dreamed up a better day. Morgane & the boys are doing great & we appreciate everyone's support!"

Stapleton released the second part of his award-winning album From A Roomon Dec. 1. Volume 1 of the project, the album that won Album of the Year at the 2018 ACMs, came out in May.